|
Whether you got a hydraulic power steering system, a DRAVI by Citroën, an electric hydraulic or Servotronic system the basic concept is the same. You got a pressurized hydraulic fluid actuating the steering mechanism, i.e. rack and pinion or recirculating ball. Then what you do with the excess fluid, such as when it reaches its maximum wheel travel? You got to "waste" the excess fluid by returning it back to the reservoir. This is the swish sound which is absent on EPS system. The loudest are on the American made cars, the quietest are the European ones. On my 2009 e93 you really have to listen to it. As it wears, the "waste gate" valve will be deteriorated and become noisier.
__________________
Sou fanático por conversíveis... |